What I have found to help my stem plants is the root tabs. While Easy Green is great (my java ferns love it) I find it doesn't help my stem plants(root feeders) as much as the tabs. You may want to do a small experiment and put in root tabs (I use the Easy Root Tabs from the Co-Op) in a small section of your tank and see how the plants react. If they react well you know to spread the love to the others, if not you can adjust.